CN112939397A - Method and system for sludge carbonization-coupled fusion treatment - Google Patents
Method and system for sludge carbonization-coupled fusion treatment Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/30—Other processes in rotary ovens or retorts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/32—Other processes in ovens with mechanical conveying means
- C10B47/44—Other processes in ovens with mechanical conveying means with conveyor-screws
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/466—Entrained flow processes
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/485—Entrained flow gasifiers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/52—Ash-removing devices
- C10J3/526—Ash-removing devices for entrained flow gasifiers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/027—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using cyclone separators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0946—Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0959—Oxygen
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0983—Additives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0983—Additives
- C10J2300/0996—Calcium-containing inorganic materials, e.g. lime
Abstract
The invention relates to the technical field of solid waste recycling, and provides a method and a system for sludge carbonization-coupled fusion treatment. According to the invention, wet sludge is subjected to carbonization treatment after being dried, so that the reduction of sludge is realized, carbonized residues generated by the carbonization treatment are subjected to melting treatment to obtain gasified coal gas and slag, the slag is subjected to chilling slag discharge treatment to realize thorough harmless treatment, and the gasified coal gas is used as a heat source for the carbonization treatment; and (3) burning the oil-gas mixture generated by carbonization, taking the generated high-temperature flue gas as a heat source for drying treatment, and purifying the dried low-temperature flue gas to discharge the flue gas after reaching the standard. The method provided by the invention can realize thorough harmless treatment of the sludge, can recycle energy, has low energy consumption, obvious reduction level, high resource level and thorough harmless level in the whole process, and is easy for industrial popularization and application. The system provided by the invention has low operation cost and small equipment investment.
Description
Technical Field
The invention relates to the technical field of solid waste recycling, in particular to a method and a system for sludge carbonization-coupled fusion treatment.
Background
The sludge is a byproduct which cannot be avoided by various current sewage treatment methods, and the components of the sludge are complex, so that secondary pollution to the environment is easily caused if the sludge is not treated properly. Therefore, how to properly treat the sludge to make the sludge stable, harmless, reduced and recycled becomes an urgent problem to be solved in environmental pollution treatment.
The common sludge treatment technologies mainly comprise dehydration landfill, aerobic composting, anaerobic digestion, drying incineration and the like, wherein the dehydration landfill has the advantages of simple operation and low cost, but the dehydration landfill cannot recycle resources due to final disposal, occupies land resources, has secondary pollution risks, and is subject to national regulations to gradually limit sludge to enter landfill sites. The aerobic composting is to convert degradable organic matters in the sludge into stable humoid substances by utilizing the metabolic action of aerobic microorganisms, and the process has the advantages of high automation degree, short period, small occupied area, large aeration amount, secondary pollution problems of odor and the like, unstable product properties and no market selling. Anaerobic digestion is a treatment technology for decomposing sludge by anaerobic microorganisms through self biochemical reaction under anaerobic conditions, but the technology is easily influenced by the organic matter content of the sludge, and has the problems of long sludge digestion time, low anaerobic conversion rate and the like. Although the reduction level of the drying incineration treatment is high, the drying incineration treatment has the problem of pollution caused by dioxin and heavy metal fly ash.
The sludge carbonization is a treatment method for decomposing organic matters in the sludge into oil, gas and carbon by heating under the anaerobic or anoxic condition, the method reduces the generation of secondary pollution gases such as nitric oxide, oxysulfide and the like to a great extent, simultaneously has no pollution problems of dioxin and heavy metal fly ash, and has better environmental protection property. However, carbonization residues are generated in the sludge carbonization treatment, the carbon content in the carbonization residues is high, the carbonization residues have a certain calorific value, and the traditional method cannot effectively utilize the energy in the carbonization residues, so that the energy waste is caused.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for sludge carbonization-coupled fusion treatment. The method provided by the invention has the advantages of low energy consumption, obvious reduction level, high resource level, thorough harmless level, simple process and easy industrial popularization and application; the system provided by the invention has low operation cost and small equipment investment.
In order to achieve the above object, the present invention provides the following technical solutions:
a method for sludge carbonization-coupled fusion treatment comprises the following steps:
drying wet sludge to obtain dried sludge and condensate water;
carbonizing the dried sludge to obtain carbonized residue and an oil-gas mixture;
mixing the carbonized residues, additives and oxygen for melting treatment to obtain gasified coal gas and molten slag; the gasified coal gas is used as a heat source for carbonization treatment;
burning the oil-gas mixture to obtain high-temperature flue gas, taking the high-temperature flue gas as a heat source for drying treatment, and drying to obtain low-temperature flue gas; the temperature of the high-temperature flue gas is 850-950 ℃, and the temperature of the low-temperature flue gas is 150-200 ℃;
purifying the low-temperature flue gas to obtain standard flue gas;
and carrying out chilling slag discharge treatment on the molten slag to obtain a vitreous body.
Preferably, the drying treatment is direct drying; the water content of the wet sludge is 60-90%, and the water content of the dried sludge is 10-30%.
Preferably, the heating mode of the carbonization treatment is indirect heating; the carbonization treatment is carried out in a rotary furnace, the temperature of the carbonization treatment is 500-700 ℃, the temperature of the carbonization residue is 400-500 ℃, and the heat value of the carbonization residue is 2000-3000 kcal/kg; the temperature of the oil-gas mixture is 500-700 ℃.
Preferably, the temperature of the incineration treatment is 850-950 ℃, the incineration treatment is carried out in a gas furnace, and the retention time of high-temperature flue gas in the gas furnace is more than 2 s;
the incineration treatment is carried out under the action of auxiliary fuel, and the auxiliary fuel is natural gas and/or diesel oil.
Preferably, the additive comprises CaO and Fe2O3And Al2O3One or more of the above; the weight ratio of the added CaO is 0-20% and the total weight of the carbonized residue and the additive is 100%, and the weight ratio of the added Fe is 0-20%2O30 to 20% by weight of Al2O3The weight ratio of (A) is 0-30%.
Preferably, the melting treatment is carried out in an entrained flow bed, the temperature of the melting treatment is 1300-1500 ℃, and the pressure is 2-4 MPa.
Preferably, the calorific value of the gasified gas is 1400-1800 kcal/Nm3。
The invention also provides a system for the carbonization-coupled fusion treatment of sludge, which comprises:
the system comprises a direct flue gas drying device (1), wherein the direct flue gas drying device (1) is provided with a wet sludge inlet, a high-temperature flue gas inlet, a dried sludge outlet, a low-temperature flue gas outlet and a condensed water outlet;
the rotary furnace (2) is provided with a dried sludge inlet, a gasified coal gas inlet, a carbonized residue outlet and an oil-gas mixture outlet, and the dried sludge inlet is communicated with the dried sludge outlet of the direct flue gas drying device (1);
the system comprises an entrained flow bed (3), wherein the entrained flow bed (3) is provided with a carbonized residue inlet, an additive inlet, an oxygen inlet, a slag outlet and a gasified coal gas outlet, the carbonized residue inlet is communicated with the carbonized residue outlet of the rotary furnace (2), and the gasified coal gas outlet is communicated with the gasified coal gas inlet of the rotary furnace (2);
the gas furnace (4) is provided with an oil-gas mixture inlet, an auxiliary fuel inlet and a high-temperature flue gas outlet, the oil-gas mixture inlet is communicated with the oil-gas mixture outlet of the rotary furnace (2), and the high-temperature flue gas outlet is communicated with the high-temperature flue gas inlet of the flue gas direct drying device (1);
the flue gas purification device (5) is provided with a low-temperature flue gas inlet and a flue gas outlet, and the low-temperature flue gas inlet is communicated with the low-temperature flue gas outlet of the flue gas direct drying device (1);
the slag chilling device (6) is provided with a slag inlet and a vitreous body outlet, and the slag inlet is communicated with the slag outlet of the entrained flow bed (3).
Preferably, the flue gas purification device (5) is one or a combination of more of a cyclone dust removal device, a cloth bag dust removal device, a wet deacidification device, a biological deodorization device and an activated carbon adsorption device.
Preferably, a three-stage spiral crushing discharging device is arranged at a carbonization residue outlet of the rotary furnace (2).
Has the advantages that:
(1) according to the invention, wet sludge is subjected to carbonization treatment after being dried, so that the reduction of sludge is realized, carbonized residues generated by the carbonization treatment are subjected to melting treatment to obtain gasified coal gas and slag, the slag is subjected to chilling slag discharge treatment to realize thorough harmless treatment, and the gasified coal gas is used as a heat source for the carbonization treatment; and (3) burning the oil-gas mixture generated by carbonization, taking the generated high-temperature flue gas as a heat source for drying treatment, and purifying the dried low-temperature flue gas to discharge the flue gas after reaching the standard. The method provided by the invention couples carbonization treatment and melting treatment, can realize thorough harmless treatment of sludge, and can effectively utilize the energy of carbonized residues.
(2) The wet sludge has high water content (60-90%), the wet sludge is difficult to dehydrate to below 30% by adopting the conventional plate-and-frame filter pressing technology, if the wet sludge is indirectly dried by adopting steam or heat conducting oil, the heat transfer efficiency is low, and the operation cost is high, the invention utilizes high-temperature flue gas generated by burning an oil-gas mixture to carry out drying treatment on the wet sludge, the high-temperature flue gas directly contacts with the wet sludge for heat exchange, the heat of the high-temperature flue gas is utilized to improve the drying efficiency of the wet sludge, and the drying operation cost is; furthermore, when the moisture content of the dried sludge is higher than 30%, the energy consumption of rear-end carbonization treatment is increased, and when the moisture content of the dried sludge is less than 10%, the risk of dust explosion exists, so that the moisture content of the dried sludge is controlled to be 10-30%.
(3) The temperature range of the high-temperature flue gas is controlled to be 850-950 ℃, so that dioxin is not generated when the oil-gas mixture is combusted in the gas furnace, and the environmental protection property of the system is improved. Meanwhile, the temperature range of the low-temperature flue gas is controlled to be 150-200 ℃, the temperature of the low-temperature flue gas can be ensured to meet the requirements of subsequent cloth bag dust removal, biological deodorization and the like, and the heat of the high-temperature flue gas can be utilized to the maximum extent.
(4) Furthermore, the rotary furnace is used as a carbonization treatment device, the heating mode of the rotary furnace is indirect heating, and the oil-gas mixture generated by carbonization has less impurities and high heat value and is beneficial to combustion. The method controls the temperature of carbonization treatment to be 500-700 ℃, and controls the temperature of carbonization residues to be 400-500 ℃, so that most of organic matters in the sludge can be guaranteed to be decomposed.
(5) Furthermore, the temperature of the oil-gas mixture generated after carbonization is 500-700 ℃, and the mixture is in a gaseous state, so that the gas furnace is used as an incineration device for the oil-gas mixture. According to the invention, the temperature of the high-temperature flue gas is maintained at 850-950 ℃ by adding the auxiliary fuel, and the water content of the dried sludge is maintained at 10-30%, so that the continuous and stable operation of the system is ensured.
(6) Furthermore, the temperature of the melting treatment is controlled to be 1300-1500 ℃, the pressure is controlled to be 2-4 MPa, the high-temperature melting temperature can be ensured to exceed the melting point of the carbonized residues, and the molten slag generated by the entrained flow bed is cooled in a water chilling mode, so that thoroughly harmless glass bodies can be obtained.
(7) The system provided by the invention comprises a direct flue gas drying device 1, a rotary furnace 2, an entrained flow bed 3, a gas furnace 4, a flue gas purification device 5 and a chilling slag discharge device 6, and the system has low operation cost and small equipment investment.
(8) Furthermore, the low-temperature flue gas generated by the drying treatment is purified, and the adopted flue gas purification device is one or a combination of more of cyclone dust removal, cloth bag dust removal, wet deacidification, biological deodorization or activated carbon adsorption, so that various indexes in the flue gas can meet the relevant national and local standards, and the standard emission is realized.
(9) Furthermore, a three-stage spiral crushing and discharging device is arranged at a carbonization residue outlet of the rotary furnace, so that the carbonization residue is crushed, and the requirement of the furnace entering particle size of a rear-end entrained flow bed is met. The temperature range of the carbonization residues is 400-500 ℃, and the carbonization residues are sprayed into the entrained flow furnace through the high-temperature burner, so that the heat utilization rate of the system can be improved.
Drawings
FIG. 1 is a process flow diagram of a method for sludge carbonization-coupled high-temperature melting treatment provided by the invention;
FIG. 2 is a schematic structural diagram of a system for sludge carbonization-coupled high-temperature melting treatment provided by the invention;
in fig. 2: 1-direct drying device of flue gas, 2-rotary furnace, 3-entrained flow, 4-gas furnace, 5-flue gas purification device, and 6-chilling slag discharge device.
Detailed Description
The invention provides a method for sludge carbonization-coupled fusion treatment, which comprises the following steps:
drying wet sludge to obtain dried sludge and condensate water;
carbonizing the dried sludge to obtain carbonized residue and an oil-gas mixture;
mixing the carbonized residues, additives and oxygen for melting treatment to obtain gasified coal gas and molten slag; the gasified coal gas is used as a heat source for carbonization treatment;
burning the oil-gas mixture to obtain high-temperature flue gas, taking the high-temperature flue gas as a heat source for drying treatment, and drying to obtain low-temperature flue gas;
purifying the low-temperature flue gas to obtain standard flue gas;
and carrying out chilling slag discharge treatment on the molten slag to obtain a vitreous body.
The invention carries out drying treatment on wet sludge to obtain dried sludge and condensed water. The invention has no special requirements on the source and the type of the wet sludge, and the wet sludge known by the technical personnel in the field can be treated by the method of the invention, such as municipal sludge, oily sludge, printing and dyeing sludge and the like. In the invention, the moisture content of the wet sludge is preferably 60-90%, more preferably 70-80%, and the moisture content of the dried sludge is preferably 10-30%, more preferably 15-25%. In the present invention, the drying treatment is specifically and preferably to directly dry the wet sludge by using high temperature flue gas, the high temperature flue gas comes from the incineration treatment process of the oil-gas mixture, and the following specific description is provided, in the specific embodiment of the present invention, natural gas or diesel oil is preferably used as a heat source when the drying treatment is performed for the first time, and the high temperature flue gas generated by the incineration treatment is used as a heat source in the following specific embodiment; the temperature of the high-temperature flue gas is preferably 850-950 ℃, and more preferably 880-920 ℃; the invention controls the temperature of the high-temperature flue gas within the range, can ensure the drying efficiency of the sludge, can ensure that no dioxin is generated during incineration of the oil-gas mixture, and improves the environmental protection property of the system.
In the invention, the high-temperature flue gas is used for drying the wet sludge to form low-temperature flue gas, and the temperature of the low-temperature flue gas is preferably 150-200 ℃, and more preferably 160-180 ℃; the invention controls the temperature of the low-temperature flue gas in the range, can ensure that the temperature of the low-temperature flue gas meets the requirements of subsequent cloth bag dust removal, biological deodorization and the like, and can also ensure that the heat of the high-temperature flue gas is utilized to the maximum extent. The invention uses the high-temperature flue gas to directly contact with the wet sludge for heat exchange, can improve the drying efficiency of the wet sludge and reduce the drying operation cost, and the high-temperature flue gas comes from the incineration treatment process of the oil-gas mixture, can realize the full utilization of energy in the sludge recovery process, and further reduces the cost.
After the dried sludge is obtained, the invention carries out carbonization treatment on the dried sludge to obtain carbonized residue and an oil-gas mixture. In the invention, the heating mode of the carbonization treatment is preferably indirect heating, and the carbonization treatment is preferably carried out in a rotary furnace, so that the oil-gas mixture generated by the carbonization treatment has less impurities and high heat value and is beneficial to combustion; in the invention, the carbonization treatment temperature is preferably 500-700 ℃, and more preferably 550-650 ℃; the carbonization treatment is carried out at the temperature of the invention, which can ensure that most organic matters in the sludge are decomposed, and the invention can realize the reduction treatment of the sludge through the carbonization treatment. In the present invention, the heat source of the carbonization treatment is the gasified coal gas generated in the subsequent melting step, and in the specific embodiment of the present invention, natural gas or diesel oil is preferably used as the heat source when the carbonization treatment is performed for the first time, and the gasified coal gas generated in the melting treatment is preferably used as the heat source in the subsequent steps.
In the invention, the temperature of the carbonization residue is preferably 400-500 ℃, and more preferably 420-450 ℃; the calorific value of the carbonized residue is preferably 2000-3000 kcal/kg, more preferably 2200-2600 kcal/kg, the calorific value of the carbonized residue is controlled within the above range, the carbonized residue can be ensured to have a certain carbon content, and high-calorific-value gasified coal gas can be obtained through a rear-end high-temperature melting reaction. In the invention, the temperature of the oil-gas mixture is preferably 500-700 ℃, more preferably 550-650 ℃, and the temperature of the oil-gas mixture is controlled within the range, so that the thermal state direct combustion of the oil-gas mixture can be ensured.
After the carbonization treatment is finished, the oil-gas mixture generated by the carbonization treatment is incinerated to obtain high-temperature flue gas, the high-temperature flue gas is used as a heat source in the drying treatment step, and the low-temperature flue gas is obtained after the drying treatment. In the invention, the temperature of the incineration treatment is preferably 850-950 ℃, more preferably 880-920 ℃, the incineration treatment is preferably carried out in a gas furnace, the residence time of the high-temperature flue gas in the gas furnace is preferably more than 2s, more preferably 3-5 s, the residence time of the high-temperature flue gas is controlled to be more than 2s, no dioxin is generated when the oil-gas mixture is combusted in the gas furnace, and the environmental protection property of the system is improved. In the invention, the temperature of the oil-gas mixture is 500-700 ℃, and the oil-gas mixture is in a gas state, so the gas furnace is used as an oil-gas mixture burning device.
In the present invention, the incineration treatment is preferably carried out under the action of an auxiliary fuel, preferably natural gas and/or diesel; in the specific embodiment of the invention, when the sludge has high water content and few organic components, the temperature of high-temperature flue gas generated by incineration is lower than 850 ℃, the heat of the high-temperature flue gas is low and is not enough for drying, and the water content of the dried sludge is higher than 30%. When the temperature of the high-temperature flue gas is lower than the range or the water content of the dried sludge is higher than the range, the invention preferably ensures the continuous and stable operation of the system by adding the auxiliary fuel.
In the invention, the temperature of the high-temperature flue gas obtained by incineration is 850-950 ℃, the high-temperature flue gas is used as a heat source for drying treatment, and the low-temperature flue gas can be obtained after the drying treatment. After the low-temperature flue gas is obtained, the low-temperature flue gas is subjected to flue gas purification treatment to obtain the flue gas reaching the standard, so that the flue gas is discharged reaching the standard.
Has been carbonizedAfter the carbonization treatment, the carbonization residue, the additive and the oxygen generated by the carbonization treatment are mixed and melted to obtain the gasified coal gas and the slag. In the invention, the melting treatment is preferably carried out in an entrained flow, the temperature of the melting treatment is preferably 1300-1500 ℃, more preferably 1350-1450 ℃, and the pressure is preferably 2-4 MPa, more preferably 2.5-3.5 MPa; in the present invention, the additive preferably includes CaO, Fe2O3And Al2O3One or more of the above; the invention is preferably based on SiO in the carbonized residue2CaO, and the like, and controlling the content of CaO and Fe2O3Or Al2O3Specifically, the weight ratio of CaO added is preferably 0 to 20%, more preferably 5 to 15%, and the Fe is preferably added in an amount of 100% by weight based on the total weight of the carbonized residue and the additive2O3The addition weight ratio of (A) is preferably 0 to 20%, more preferably 5 to 15%, and the Al is2O3Preferably 0 to 30%, more preferably 5 to 25%, in a specific embodiment of the present invention, the CaO and Fe are added in an amount of 0 to 30% by weight2O3And Al2O3The amount of (A) is not 0 at the same time. The invention mixes the carbonized residue with the additive and oxygen for melting treatment, and can reduce the energy consumption of the entrained flow bed.
In the invention, the calorific value of the gasified coal gas is preferably 1400-1800 kcal/Nm3The invention preferably takes the gasified coal gas as the heat source for carbonization treatment, can realize effective utilization of carbonized residue energy, and reduces the energy consumption and the operation cost of the system.
After the melting treatment is finished, the slag generated by the melting treatment is quenched and discharged to obtain a vitreous body. The invention preferably adopts a water chilling mode to cool the slag, so as to obtain thoroughly harmless vitreous bodies.
The invention also provides a system for the sludge carbonization coupling melting treatment, which comprises a direct flue gas drying device 1, a rotary furnace 2, an entrained flow bed 3, a gas furnace 4, a flue gas purification device 5 and a chilling slag discharge device 6.
The system provided by the invention comprises a direct drying device 1 for flue gas. In the invention, the direct flue gas drying device 1 is provided with a wet sludge inlet, a high-temperature flue gas inlet, a dried sludge outlet, a low-temperature flue gas outlet and a condensed water outlet; the invention utilizes the direct drying device 1 of the flue gas to carry out drying treatment on wet sludge so as to obtain dried sludge, low-temperature flue gas and condensed water.
The system provided by the invention comprises a rotary kiln 2. In the invention, the rotary furnace 2 is provided with a dried sludge inlet, a gasified coal gas inlet, a carbonized residue outlet and an oil-gas mixture outlet, and the dried sludge inlet is communicated with the dried sludge outlet of the direct flue gas drying device 1; in the invention, a three-stage spiral crushing discharging device is preferably arranged at a carbonization residue outlet of the rotary furnace 2, and the carbonization residue can be directly sprayed into the entrained flow bed 3 furnace through a high-temperature burner in a hot state after passing through the three-stage spiral crushing discharging device, so that the heat utilization rate of the system is improved. The invention utilizes the rotary furnace 2 to carry out indirect carbonization treatment on the dried sludge to obtain carbonized residues and oil-gas mixtures, thereby realizing the reduction treatment of the sludge.
The system provided by the invention comprises an entrained flow bed 3. In the invention, the entrained flow bed 3 is provided with a carbonized residue inlet, an additive inlet, an oxygen inlet, a slag outlet and a gasified coal gas outlet, the carbonized residue inlet is communicated with the carbonized residue outlet of the rotary furnace 2, and the gasified coal gas outlet is communicated with the gasified coal gas inlet of the rotary furnace 2; the invention utilizes the entrained flow bed 3 to carry out high-temperature melting treatment on carbonized residues, additives and oxygen together to obtain gasified coal gas and slag.
The system provided by the invention comprises a gas burner 4. In the invention, the gas furnace 4 is provided with an oil-gas mixture inlet, an auxiliary fuel inlet and a high-temperature flue gas outlet, the oil-gas mixture inlet is communicated with the oil-gas mixture outlet of the rotary furnace 2, and the high-temperature flue gas outlet is communicated with the high-temperature flue gas inlet of the flue gas direct drying device 1. The invention uses the gas furnace 4 to burn the oil-gas mixture to obtain high-temperature flue gas.
The system provided by the invention comprises a flue gas cleaning device 5. In the invention, the flue gas purification device 5 is provided with a low-temperature flue gas inlet and a flue gas outlet, and the low-temperature flue gas inlet is communicated with the low-temperature flue gas outlet of the flue gas direct drying device 1; the flue gas purification device 5 is preferably one or a combination of more of a cyclone dust removal device, a cloth bag dust removal device, a wet deacidification device, a biological deodorization device and an activated carbon adsorption device. The invention utilizes the flue gas purification device 5 to purify the low-temperature flue gas so as to obtain the flue gas, thereby realizing the standard emission of the flue gas.
The system provided by the invention comprises a chilling slag discharge device 6. In the invention, the chilling slag discharging device 6 is provided with a slag inlet and a vitreous body outlet, and the slag inlet is communicated with the slag outlet of the entrained flow bed 3. The chilling slag discharging device 6 is used for cooling the slag to obtain the vitreous body, so that the thorough harmless treatment of the sludge is realized.
When the system provided by the invention is used for carrying out carbonization-coupling high-temperature melting treatment on sludge, the control conditions of each step are consistent with the scheme, and the details are not repeated.
FIG. 1 is a process flow diagram of a method for sludge carbonization-coupled high-temperature melting treatment provided by the invention; fig. 2 is a schematic structural diagram of a system for sludge carbonization-coupled high-temperature melting treatment provided by the invention. The method and system of the present invention are described in detail below with reference to FIGS. 1-2: sending the wet sludge into a direct flue gas drying device 1 for drying treatment to obtain dried sludge, low-temperature flue gas and condensate water; the dried sludge is sent into a rotary furnace 2 for carbonization treatment to obtain carbonized residues and an oil-gas mixture, thereby realizing the reduction treatment of the sludge; the carbonized residues, additives and oxygen are sent into the entrained flow bed 3 together for melting treatment to obtain gasified coal gas and molten slag, and the gasified coal gas is used as a heat source for carbonization treatment to reduce the energy consumption of the system; sending the oil-gas mixture into a gas furnace 4 for incineration treatment to obtain high-temperature flue gas; introducing high-temperature flue gas into the flue gas direct drying device 1 to be used as a heat source for drying treatment so as to obtain low-temperature flue gas; sending the low-temperature flue gas into a flue gas purification device 5 for flue gas purification treatment so as to obtain the flue gas, thereby realizing the standard emission of the flue gas; the slag is subjected to chilling slag discharge treatment through a chilling slag discharge device 6 to obtain a vitreous body, so that thorough harmless treatment of sludge is realized.
The method provided by the invention has the advantages of low energy consumption, obvious reduction level, high resource level, thorough harmless level and easy industrial popularization and application; the whole system has low operation cost, small equipment investment and simple process.
The technical solutions of the present invention will be clearly and completely described below with reference to the following examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The system for treating the wet sludge of a municipal sewage treatment plant by utilizing the sludge carbonization-coupling high-temperature melting treatment is used for treating the wet sludge, the moisture content of the wet sludge is 90%, and industrial analysis and element analysis are shown in table 1, wherein the process flow of the sludge carbonization-coupling high-temperature melting treatment is shown in fig. 1, and the structural schematic diagram of the used system is shown in fig. 2. The specific treatment process comprises the following steps:
TABLE 1 Industrial analysis of sludge and elemental analysis
Sending wet sludge with the water content of 90% into a direct flue gas drying device 1 for drying treatment to obtain dried sludge with the water content of 10%, low-temperature flue gas and condensate water; the drying treatment adopts direct drying of flue gas, the flue gas is high-temperature flue gas obtained by burning and treating a rear-end oil-gas mixture, the temperature of the high-temperature flue gas is 850 ℃, and the temperature of the low-temperature flue gas obtained by drying treatment is 150 ℃.
The dried sludge is sent into a rotary furnace 2 to be subjected to indirect carbonization treatment to obtain carbonized residues and an oil-gas mixture, so that the sludge reduction treatment is realized, the carbonization treatment is carried out in an indirect heating mode, the temperature in the rotary furnace 2 is 700 ℃, the temperature of the carbonized residues is 500 ℃, the heat value is 2000kcal/kg, and the temperature of the oil-gas mixture is 700 ℃.
Feeding carbonized residues generated by indirect carbonization treatment, additives and oxygen into an entrained flow bed 3 together for melting treatment to obtain gasified coal gas and molten slag, wherein the additives are CaO and Fe2O3The CaO is added in a weight ratio of 20% and the Fe is added in an amount of 100% by weight of the total weight of the carbonized residue and the additives2O3The addition weight ratio of (A) is 20%; the temperature range in the entrained flow bed is 1500 ℃, and the pressure is 4 MPa. The gasified coal gas generated by the melting treatment is used as a heat source for indirect carbonization treatment, so that the energy consumption of the system is reduced; the calorific value of the gasified gas is 1400kcal/Nm3。
And (3) sending the oil-gas mixture generated by the indirect carbonization treatment into the gas furnace 4 for incineration treatment to obtain high-temperature flue gas. The temperature in the gas furnace is 850 ℃, the smoke retention time is more than 2s, the gas furnace is provided with auxiliary fuel, and the auxiliary fuel is natural gas. And introducing the high-temperature flue gas into the flue gas direct drying device 1 to be used as a heat source for drying treatment so as to obtain the low-temperature flue gas. And sending the low-temperature flue gas into a flue gas purification device 5 for flue gas purification treatment to obtain the flue gas, thereby realizing the standard emission of the flue gas.
The slag generated by the melting treatment is subjected to chilling slag discharge treatment through a chilling slag discharge device 6 to obtain a vitreous body, so that the thorough harmless treatment of the sludge is realized. And the chilling slag discharge adopts a water chilling mode to cool the molten slag.
Example 2
The method is characterized in that the system for the sludge carbonization-coupling high-temperature melting treatment is used for treating the oily sludge of a certain chemical plant, the water content of the oily sludge is 60%, the composition analysis is shown in table 2, the process flow of the sludge carbonization-coupling high-temperature melting treatment is shown in figure 1, and the structural schematic diagram of the used system is shown in figure 2. The specific treatment process comprises the following steps:
TABLE 2 sludge Industrial analysis and elemental analysis
Sending the oily sludge with the water content of 60% into a direct flue gas drying device 1 for drying treatment to obtain dried sludge with the water content of 30%, low-temperature flue gas and condensate water; the drying treatment adopts direct drying of flue gas, and the flue gas is high-temperature flue gas obtained after incineration treatment of a rear-end oil-gas mixture. The temperature of the high-temperature flue gas is 950 ℃, and the temperature of the low-temperature flue gas is 200 ℃.
The dried sludge is sent into a rotary furnace 2 to be subjected to indirect carbonization treatment to obtain carbonized residues and an oil-gas mixture, so that the sludge reduction treatment is realized, the carbonization treatment is carried out in an indirect heating mode, the temperature in the rotary furnace is 500 ℃, the temperature of the carbonized residues is 400 ℃, the heat value is 3000kcal/kg, and the temperature of the oil-gas mixture is 500 ℃.
And (3) feeding the carbonized residues, additives and oxygen into the entrained flow bed 3 together for high-temperature melting treatment to obtain gasified coal gas and molten slag. The additive is CaO and Al2O3The weight ratio of CaO added is 10% and Al added is 100% of the total weight of the carbonized residue and the additives2O3Is 30% by weight. The temperature range in the entrained flow bed is 1300 ℃, and the pressure is 2 MPa. The gasified coal gas is used as a heat source for indirect carbonization treatment, so that the energy consumption of the system is reduced. The calorific value of the gasified gas is 1800kcal/Nm3。
And (3) feeding the oil-gas mixture generated by the indirect carbonization treatment into a gas furnace 4 for incineration treatment to obtain high-temperature flue gas, wherein the furnace temperature of the gas furnace is 950 ℃, and the flue gas retention time is more than 2 s. The gas furnace is provided with auxiliary fuel, and the auxiliary fuel is diesel oil. Introducing the high-temperature flue gas into the flue gas direct drying device 1 to be used as a heat source for drying treatment, so as to obtain the low-temperature flue gas. And sending the low-temperature flue gas into a flue gas purification device 5 for flue gas purification treatment to obtain the flue gas, thereby realizing the standard emission of the flue gas.
Slag generated by the melting treatment is subjected to chilling slag discharge treatment through a chilling slag discharge device 6 to obtain a vitreous body, so that thorough harmless treatment of sludge is realized; and the chilling slag discharge adopts a water chilling mode to cool the molten slag.
Example 3
The system for treating the printing and dyeing sludge of a certain printing and dyeing mill by utilizing the sludge carbonization-coupled high-temperature melting treatment is used, the water content of the printing and dyeing sludge is 70%, the industrial analysis and the element analysis are shown in table 1, wherein the process flow of the sludge carbonization-coupled high-temperature melting treatment is shown in figure 1, and the structural schematic diagram of the used system is shown in figure 2. The specific treatment process comprises the following steps:
TABLE 3 sludge Industrial analysis and elemental analysis
Sending the printing and dyeing sludge with the water content of 70% into a direct flue gas drying device 1 for drying treatment to obtain dried sludge with the water content of 20%, low-temperature flue gas and condensate water; the drying treatment adopts direct drying of flue gas, the flue gas is high-temperature flue gas obtained by burning and treating a rear-end oil-gas mixture, the temperature of the high-temperature flue gas is 900 ℃, and the temperature of the low-temperature flue gas is 180 ℃.
The dried sludge is sent into a rotary furnace 2 to be subjected to indirect carbonization treatment to obtain carbonized residues and an oil-gas mixture, so that the sludge reduction treatment is realized, the carbonization treatment adopts indirect heating, the temperature in the rotary furnace is 600 ℃, the temperature of the carbonized residues is 450 ℃, the heat value is 2500kcal/kg, and the temperature of the oil-gas mixture is 600 ℃.
Feeding carbonized residues generated by indirect carbonization treatment, an additive and oxygen into an entrained flow bed 3 together for high-temperature melting treatment to obtain gasified coal gas and molten slag, wherein the additive is Fe2O3And Al2O3The Fe being present in an amount of 100% by weight based on the total weight of the carbonized residue and the additives2O3Is 10% by weight of the Al2O3Is 20% by weight. The temperature range in the entrained flow bed is 1400 ℃, and the pressure is 3 MPa. The gasified gas is used as an indirect carbonization partThe heat source is used so as to reduce the energy consumption of the system, and the calorific value of the gasified gas is 1600kcal/Nm3。
And (2) feeding the oil-gas mixture generated by the indirect carbonization treatment into a gas furnace 4 for incineration treatment to obtain high-temperature flue gas, wherein the temperature in the gas furnace is 900 ℃, the residence time of the flue gas is more than 2s, and the gas furnace is provided with auxiliary fuel which is natural gas. And introducing the high-temperature flue gas into the flue gas direct drying device 1 to be used as a heat source for drying treatment so as to obtain the low-temperature flue gas. And sending the low-temperature flue gas into a flue gas purification device 5 for flue gas purification treatment to obtain the flue gas, thereby realizing the standard emission of the flue gas.
Slag generated by the melting treatment is subjected to chilling slag discharge treatment through a chilling slag discharge device 6 to obtain a vitreous body, so that thorough harmless treatment of sludge is realized; and the chilling slag discharge adopts a water chilling mode to cool the molten slag.
The embodiment shows that the method provided by the invention has the advantages of low energy consumption, obvious reduction level, high resource level, thorough harmless level and easy industrial popularization and application; the whole system has low operation cost, small equipment investment and simple process.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The method for the carbonization-coupled fusion treatment of the sludge is characterized by comprising the following steps of:
drying wet sludge to obtain dried sludge and condensate water;
carbonizing the dried sludge to obtain carbonized residue and an oil-gas mixture;
mixing the carbonized residues, additives and oxygen for melting treatment to obtain gasified coal gas and molten slag; the gasified coal gas is used as a heat source for carbonization treatment;
burning the oil-gas mixture to obtain high-temperature flue gas, taking the high-temperature flue gas as a heat source for drying treatment, and drying to obtain low-temperature flue gas; the temperature of the high-temperature flue gas is 850-950 ℃, and the temperature of the low-temperature flue gas is 150-200 ℃;
purifying the low-temperature flue gas to obtain standard flue gas;
and carrying out chilling slag discharge treatment on the molten slag to obtain a vitreous body.
2. The method of claim 1, wherein the drying process is direct drying; the water content of the wet sludge is 60-90%, and the water content of the dried sludge is 10-30%.
3. The method according to claim 1, wherein the carbonization treatment is performed by indirect heating; the carbonization treatment is carried out in a rotary furnace, the temperature of the carbonization treatment is 500-700 ℃, the temperature of the carbonization residue is 400-500 ℃, and the heat value of the carbonization residue is 2000-3000 kcal/kg; the temperature of the oil-gas mixture is 500-700 ℃.
4. The method according to claim 1, wherein the temperature of the incineration treatment is 850-950 ℃, the incineration treatment is carried out in a gas furnace, and the residence time of high-temperature flue gas in the gas furnace is more than 2 s;
the incineration treatment is carried out under the action of auxiliary fuel, and the auxiliary fuel is natural gas and/or diesel oil.
5. The method of claim 1, wherein the additive comprises CaO, Fe2O3And Al2O3One or more of the above; the weight ratio of the added CaO is 0-20% and the total weight of the carbonized residue and the additive is 100%, and the weight ratio of the added Fe is 0-20%2O30 to 20% by weight of Al2O3The weight ratio of (A) is 0-30%.
6. The method according to claim 1, wherein the melting treatment is carried out in an entrained flow, the temperature of the melting treatment being 1300 to 1500 ℃ and the pressure being 2 to 4 MPa.
7. The method according to claim 1, wherein the gasification gas has a calorific value of 1400 to 1800kcal/Nm3。
8. A system for sludge carbonization-coupled fusion treatment is characterized by comprising:
the system comprises a direct flue gas drying device (1), wherein the direct flue gas drying device (1) is provided with a wet sludge inlet, a high-temperature flue gas inlet, a dried sludge outlet, a low-temperature flue gas outlet and a condensed water outlet;
the rotary furnace (2) is provided with a dried sludge inlet, a gasified coal gas inlet, a carbonized residue outlet and an oil-gas mixture outlet, and the dried sludge inlet is communicated with the dried sludge outlet of the direct flue gas drying device (1);
the system comprises an entrained flow bed (3), wherein the entrained flow bed (3) is provided with a carbonized residue inlet, an additive inlet, an oxygen inlet, a slag outlet and a gasified coal gas outlet, the carbonized residue inlet is communicated with the carbonized residue outlet of the rotary furnace (2), and the gasified coal gas outlet is communicated with the gasified coal gas inlet of the rotary furnace (2);
the gas furnace (4) is provided with an oil-gas mixture inlet, an auxiliary fuel inlet and a high-temperature flue gas outlet, the oil-gas mixture inlet is communicated with the oil-gas mixture outlet of the rotary furnace (2), and the high-temperature flue gas outlet is communicated with the high-temperature flue gas inlet of the flue gas direct drying device (1);
the flue gas purification device (5) is provided with a low-temperature flue gas inlet and a flue gas outlet, and the low-temperature flue gas inlet is communicated with the low-temperature flue gas outlet of the flue gas direct drying device (1);
the slag chilling device (6) is provided with a slag inlet and a vitreous body outlet, and the slag inlet is communicated with the slag outlet of the entrained flow bed (3).
9. The device according to claim 8, characterized in that the flue gas purification device (5) is one or a combination of several of a cyclone dust removal device, a cloth bag dust removal device, a wet deacidification device, a biological deodorization device and an activated carbon adsorption device.
10. The plant according to claim 8, characterized in that the carbonized residue outlet of the rotary kiln (2) is provided with a three-stage screw crushing discharge device.
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| CN113955914A (en) * | 2021-09-24 | 2022-01-21 | 中国石油化工股份有限公司 | Industrial sludge and coal cooperative treatment and resource utilization device and method |
| CN115536231A (en) * | 2022-10-13 | 2022-12-30 | 无锡雪浪环境科技股份有限公司 | Recycling treatment method for oily sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113955914A (en) * | 2021-09-24 | 2022-01-21 | 中国石油化工股份有限公司 | Industrial sludge and coal cooperative treatment and resource utilization device and method |
| CN115536231A (en) * | 2022-10-13 | 2022-12-30 | 无锡雪浪环境科技股份有限公司 | Recycling treatment method for oily sludge |
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